Just installed the Course Menu block for the first time. Install went smoothly, but when I go to Admin / Modules / Blocks / Manage Blocks and click on Settings, I get:

Section Error!
More information about this error

After tinkering with the block and changing settings, everything else seems to work fine.

Issue originally mentioned on the block's page in Modules and Plugins http://moodle.org/mod/data/view.php?rid=926&page=90

Cheers,

Paul.